The plan would represent a “major tax cut” for the rich and raise taxes “substantially” on the poor and middle class, Williams said. “Given that a big chunk doesn’t pay any income tax, this would be a big tax increase on people at bottom end. At the top end, the opposite happens.”

The top end would go from about a 35% income tax rate to 9%. “That’s a big, big drop,” Williams said, adding that the capital-gains tax would be another added benefit for the wealthiest. “People at the top would see far and away the largest share of the gains. Those people are going to see a huge tax cut.”